Aircraft Data Transmission Scheduling for Cellular Interference Control
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Solution Overview
Problem
High altitude wireless communication in cellular networks experiences increased interference, affecting transmission quality and reliability, especially for aircraft that travel over large distances and at high speeds, requiring effective scheduling to ensure reliable communication with appropriate base stations.
Innovation Solution
A method and system for scheduling data packet transmissions between aircraft and cellular network base stations, involving retrieval of aircraft location, selection of base stations, calculation of interference levels, and assignment of transmission characteristics to minimize interference, using a controller to manage scheduling and prevent overlapping characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If aircraft communicate with cellular networks at high altitude, then direct air-to-ground datalink is established, but interference increases affecting transmission quality and reliability
Solution Approach 1:
The system performs preliminary scheduling of transmission time slots and frequency assignments before actual data transmission occurs. The network controller pre-calculates and assigns transmission parameters based on predicted aircraft positions and scheduled transmissions, preventing interference issues before they arise rather than reacting to them during transmission.
Solution Approach 2:
The system dynamically adjusts transmission parameters including time slots, frequency channels, and power levels based on calculated interference levels. By changing these parameters adaptively according to the aircraft's position, speed, and network conditions, the system optimizes transmission reliability while minimizing interference effects.
2Area of stationary object
If aircraft travel over large distances at high speeds through various cells, then coverage area increases, but maintaining communication with appropriate base station becomes more difficult
Solution Approach 1:
The system uses predicted aircraft positions to pre-determine which base station should serve the aircraft during upcoming time slots. By calculating future positions based on aircraft speed and direction, the network controller prepares handover sequences in advance, ensuring seamless transitions between base stations as the aircraft moves through different cells.
Solution Approach 2:
The system continuously monitors aircraft position, speed, and communication quality, using this feedback to dynamically adjust base station assignments and transmission parameters. This real-time feedback loop ensures the aircraft maintains reliable communication with the most appropriate base station as it moves across the network coverage area.
3Productivity
If multiple transmissions are scheduled in the cellular network, then network capacity increases, but interference between transmissions increases
Solution Approach 1:
The system segments the available spectrum into multiple frequency channels and divides time into discrete slots, assigning different combinations to different transmissions. This segmentation allows multiple aircraft to communicate simultaneously through orthogonal frequency-division multiplexing and time-division multiplexing, increasing network capacity while preventing interference through resource isolation.
Solution Approach 2:
The network controller acts as an intermediary that coordinates all transmission scheduling decisions. It calculates interference levels between proposed transmissions and mediates resource allocation to ensure compatible transmissions are scheduled together, maximizing network capacity while maintaining acceptable interference levels through centralized coordination.
Data Source
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AI summary
A method of scheduling transmission of a data packet between a selected base station of a cellular network to an aircraft within a particular time period. The method includes: (a) retrieving information about the scheduled location of the aircraft; (b) selecting a base station using the retrieved information about the scheduled location of the aircraft; (c) retrieving information about transmissions that are scheduled in the cellular network; (d) for a transmission of the data packet having at least one proposed characteristic: (i) calculating an interference level of the transmission of the data packet having at least one proposed characteristic with the transmissions that are scheduled in the cellular network; and (ii) when the interference level of the transmission of the data packet is less than a particular threshold, identifying the at least one proposed characteristic as potential characteristic(s) with which to transmit the data packet.